Just a thought---are you comfortable asking any of the above listed people why they don't include you?

It could go something like, "I've noticed that I'm a person who likes to be around others but I rarely get invited anywhere. Could you give me some honest feedback as to how others perceive me?"

It might make at least one of the people you've listed aware that they are excluding you and perhaps there really is no reason for it. If there is a reason, then you can evaluate what they say and perhaps find better situations where you will meet people you have a lot more in common with.

The times in my life, when I've been alone, are when I've done a lot of volunteering. My goal was not to make friends, but to be around other people involved in an activity I enjoyed. If people started inviting me somewhere, that was just a bonus, but I tried to relax a bit about making friends. Since your one volunteering opportunity disappeared, could you find another?